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Elements of R programming

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  R is a language and environment for statistical computing and graphics.   R provides a wide variety of statistical (linear and nonlinear modeling, classical statistical tests, time-series analysis, classification, clustering, …) and graphical techniques, and is highly extensible. It was designed by  Ross Ihaka and Robert Gentleman  at the University of Auckland, New Zealand, and is currently developed by the R Development Core Team. R programming language is an implementation of the S programming language.    One of R’s strengths is the ease with which well-designed publication-quality plots can be produced, including mathematical symbols and formulae where needed. Great care has been taken over the defaults for the minor design choices in graphics, but the user retains full control.  R is available as Free Software i.e open source. I t compiles and runs on a wide variety of UNIX platforms and similar systems (including FreeBSD and Linux), Windows an...